Georgian Era Blue Paste Rivière NecklaceGeorgian Era Blue Paste Rivire Necklace England, circa 1810. A vibrant cerulean blue is a rare find from this period. Set in closed back 15k rose gold collet settings. This is a rare survivor from the early 19th century. This necklace has been worn and loved. There are some imperfections to note: some of the closed back settings have denting and punctures that are not visible while worn. There is one setting that shows evidence of repair, resulting in